tolong bantuin kak,beserta caranya ya ...

2x² + mx + 16 = 0
α = 2β

α + β = -b/a = -m/2
2β + β = -m/2
3β = -m/2
6β = -m

α×β = c/a = 16/2 = 8
2β×β = 8
2β² = 8
β² = 4
β = 2

6β = -m
6(2) = -m
12 = -m
m = -12

semangat UNBK kita ^^